ARTICLES

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POPULATION AND ADAPTATION

Population is a group of individual living in a well defined geographical area, share or compete for similar resources or potentially interbreed. size of population changes according to some factors. Adaptation is any attribute of an organism that enable the organisms to survive and reproduce in its habitat. Read More >>>

ORGANISMS AND ENVIRONMENT

Organism is highly influenced by the environment. There are two factors which characterize the habitat of an organism; abiotic and biotic components. Read More >>>

REGULATION OF GENE EXPRESSION

Expression of genes can be regulated by lac operon model which was proposed by Jacob and Monad. The regulation of lac operon by repressor is known as negative regulation. Read More >>>

PACKAGING OF DNA

DNA is tightly packed in the nucleus of every cell. DNA wraps around special proteins called histones, which form loops of DNA called nucleosomes. Read More >>>

SEARCH OF GENETIC MATERIAL

Genetic material was searched by the help of following experiments. Frederick Griffith done an experiment on streptococcus pneumoniae to recovered genetic material. Avery, Mccarty and Macleod identify the biochemical nature of genetic material. Read More >>>

POST FERTILIZATION EVENTS

Post fertilization is a series of events that take place after fertilization to develop a seed from an ovule and a fruit from an ovary. Read More >>>

ARTIFICIAL HYBRIDIZATION

Artificial hybridization is the process where desired pollen grains are introduced to the stigma through pollination. This helps to avoid unwanted pollen rejection and saves time. Double fertilization is the process where syngamy and triple fusion takes place simultaneously. Read More >>>

POLLINATION

Pollination is a process of transfer of pollen grains from male anther to the stigma of flower.All animals or insects that tranfer pollen from one plant to another are called pollinators. Read More >>>

DEVELOPMENT OF MALE AND FEMALE GAMETOPHYTE

Microsporogenesis is the process of formation of microspores from pollen mother cell. Megasporogenesis is the formation of megaspores from megaspore mother cell. Functional megaspore develops into female gametophyte. Read More >>>

REPRODUCTION IN ORGANISMS

Reproduction is defined as a biological process in which an organism gives rise to young ones or offsprings. After reproduction there is an another; fertilization. It leads to zygote formation and embryogenesis. Read More >>>

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